On the nature of the components of the potential complex induced by electric stimulation on Anodonta nerve

Lábos, Elemér and Varanka, István (1966) On the nature of the components of the potential complex induced by electric stimulation on Anodonta nerve. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 33. pp. 61-78. ISSN 0365-3005

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Abstract

The response induced with electric stimulation of the cerebrovisceral connective (CVc) of the fresh-water mussel (Anodonta cygnea L.) was examined. The experiments were conducted with the common grounding of the stimulating and measuring circuit. It was established that 1. The response is divided into a polarity dependent, to chemical influences less sensible passive and a polarity-independent blockable component. 2. The excitement is caused by the increased negativity of the site of its origin. The ground-positive excitation gives an off response. The site of origin of the response recorded is the ground plate. 3 During the polarity independent action potential the negativity of the ground electrode increases, that is in this sense it is accompanied by the change of relative positivity of the different leading-off electrode. Positive “after potential” can be observed also with DC-recording. 4. The increment and decrement observed in the course of the removal of the different leading-off electrode as well as filtering and phase-shift can be explained by the change of the complex admittance of nerve sector in the measuring circuit (r) without the assumption of the recording of the spreading wave. 5. One of the most simple non-linear models of the passive response is an impulse prolonging circuit.

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